Wiring up a semi race car.

[HIZOKU]

Yeah would not do it from 100% way to much work. just got to work out what i need to wire up and put it to a switch.

[thechuckster]

I would also delete most of those gauges - quite simply, you're not going to read them while in the thick of racing/competition. If you want to know about that stuff, datalog it - either via the ECU (if it'll support and log those sensors) or via a datalogger that also captures ECU data.

fwiw, this is the kind of instrumentation I'd like to have in my soarer:
- tacho (already in cluster)
- speedo (already in cluster)
- oil pressure (gauge already in cluster)
- coolant temp (already in cluster)
- High beam (already in cluster)
- indicators (already in cluster)
- alt light (already in cluster)
- brake fail (low fluid in MC reservoir - already in cluster)
- low oil pressure light (huge lamp where the radio was)
- blown fuse indicator lights (LEDs) underneath fuses
- fuel pump on (LED next/above manual/auto switch for pump control)

would be nice:
- low fluid in radiator or overflow bottle (a temp gauge no good if you have no coolant left)
- voltage
- shift light (above cluster - will come if/when I change ECU to megasquirt)


edit: go look at some of the rally in-car footage from ARC/WRC teams - driver just gets a shift light & gear indicator. Other important stuff is either lights in the centre console or on a small display that the Nav can see.

[andrew_mx83]

id take oil temp over speedo any day thanks. maybe even over water temp

i also use a very loud piezo buzzer for no oil pressure, cant miss that shit.

[HIZOKU]

Sorry oil pressure in cluster? i don't have this i don't even know a car with it. All the gauges i have have Bright LED lights in them and RECALL warning function and so on What is the point of having Data logging, TO tell you how you blew up your motor? a Gauge with warning light will Warn you before you blow your motor.

and your right some i don't need but There the ones i put off to the side and use when trouble shooting or tuning the car the main ones i use i put in front of me.


As for rally car information I guess you have not sat in one. They get every bit of information look at all the RACE CAR dashes all of them have a say have Motec/STACKKK/Racetech or what ever it called yeah speedo or tacho are main items but the 4 lines below them is every bit of info you could have even tire pressure. and the reason the driver see's this is he is the one who has to tell the pit team what is wrong with the car if it is pulling to left he can go OH i got lower tire pressure in the LF tire need that pumped up when i pull to stage. no point driver telling nav and nav telling pits as shit gets changed like Chinese whispers.

As for shift light? i had one there pointless time they flash in my car i have already hit limiter and got to change or im boncing off limiter and copping a annoying flash in my eyes.

[SilverRA23]

I work with race cars with over 50 grand worth of data and telemetry boxes in the car.

I can guarantee our very well paid drivers don't read all that shit on the dash, the engineers are watching those numbers and tell the driver to switch her off if there is a problem. You will be too busy to read all that shit too if you are doing it right.

Shift light - massively useful tool. Set it right though. Don't have it set on the rev limit as it will be useless just as you described. Set it 200-500rpm before your shift point so that you are changing just before you hit the limiter.

[thechuckster]

What is the point of having Data logging,

so you can review engine and chassis performance, so you can review driver performance, so you can benchmark both.

fwiw, many folks buy the racepak/motec/stakk dashes for their logging capabilities - it allows them to (legally - especially for a road-registered rally car) have a much lighter instrument cluster and also capture data/sensors that are not normally wired into the ECU (or cost a shitload more to enable those features in the ECU).

No way will you notice a low tyre warning if you are driving hard. If anything, that level of notification would be a distraction.

As for rally car information I guess you have not sat in one.

yes I have and I regularly volunteer at club/state rallies as an official so I get to look inside lots of rally cars.

Go look at some in-car WRC footage that's over the shoulder of the driver. Driver will have bugger all dash display.

no point driver telling nav and nav telling pits as shit gets changed like Chinese whispers.

you miss the point of the nav watching ancillary gauges - driver focusses on driving, the nav in his/her spare time (if htey have any) watches stuff and will warn the driver if a gauge is reading low/high or a warning light is on. More often than not, both will notice a warning light if it stays on long enough. At the pointy end of WRC rallying the telemetry is direct to the team's service trucks so no need to pass on anything except observations from driver and nav.

In any case, you set a warning light to indicate a minimum, not that something is empty (e.g. oil pressure is low, not that you have zero oil pressure) so if you're lucky, you save the engine.

As for shift light? i had one there pointless time they flash in my car i have already hit limiter and got to change or im boncing off limiter and copping a annoying flash in my eyes.

As he SilverRA23 says - set the shift light below your soft rev limit, or have a staged shift light so that you shift when all the lights are lit. Shift-light does not tell you that you've hit the limiter. The limiter is an engine protection setting, not a shift-indicator.

Engine rev limit will be above your peak power/torque point anyway so you (assuming your gearing is ideal) changing at that peak point and the next gear should be at useful spot in terms of rev/torque/power curves.

[HIZOKU]

I think you missed my point Data logging is fine i have it already but that is only good to see after you have driven my gauges are more for the warning lights. im lucky enough to have Autronic KNOCK bored going in so any forms of knock the computer will default back to a super safe tune. I would have gone a race pack dash but i could not sell my remanding gauges had 5 of them so it was easy just to buy the couple more i needed. they have warning lights and recall i can access inside the car if i want more in-depth i can go to the ECU download the data file and go ok lets look lets replay and so on. but if i'm out driving and i see a bright light flash in my eyes i know to back off (unless it shift light)

My ECU has a 7500rpm rev limit Turbo was still making power then. reason it was set there was just to be safe. and running out of injector. i might put a shift light in just a small gizzmo style one.

Most of my gauges are in my site though like i have trail fitted them the main ones speedo does not phase me much i have never had one i just know if im in 4th and on boost i'm breaking speed limit. Tacho was main item and like i said main gauges in front. i will prob put AFR and EXH GAS ones off to the side as they will be used more when tuning then anything else.

ARC 8000 should be here in 3 weeks. might buy a ARC4000 to just for light items. and save a couple spare in the 8000 just in case i decided to add anything into the car in the future.

Got to work out just windows now so power to switches and motors. i'm removing the side mirror power so they will all become manual now.

[oldcorollas]

please don't drive your "semii race car" on the road with no speedo.. you'll just make law abiding car enthusiasts look like hoons

[HIZOKU]

May daylie MX32 has no speedo.

it not hard to stick behind traffic. and cruise behind everyone. not hard not to be a traffic light racer. and not hard to know how quick your going at a RPM range in a gear.

but car will have speedo wired up once it is on the road. just saying i have not had one for the year it was on the road and never got done for speeding in it have not been done in the day car either and that has been over a year and a half

[HIZOKU]

For speedo wire up do i just run a wire from speedo sender in box R154 to the dash?